If the contractual details of malt distribution were going to affect the quality of beers you were getting then you absolutely would care. Unity's pay scheme will lead to studios shutting down if there isn't pushback. Studios switching to a different engine like Godot will make their games feel different for better or for worse and efforts to help fund these alternate engines will help tip the scale towards that being "for better".

But most importantly of all, this is a company using toxic and predatory practices. Regardless of the industry (yes, malt distributors too), if we don't push back against toxic business practices, then companies will see avenues they can take advantage of to make extra money. This is the reality of capitalism. Whatever methods can turn a profit without generating negative attention will be employed. It's in the hands of consumers, competing businesses, and the government to keep those toxic practices in check. I mean, why the fuck are we on Lemmy? Ultimately Reddit's actions are not going to affect the majority of users on their platform. Most of us came here to protest shitty business practices.